/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of California at Berkeley. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
 */

/*
 * Constants and structures defined by the internet system,
 * Per RFC 790, September 1981.
 */

/*
 * Protocols
 */
#define IPPROTO_IP          0       /* dummy for IP */
#define IPPROTO_ICMP        1       /* control message protocol */
#define IPPROTO_GGP         3       /* gateway^2 (deprecated) */
#define IPPROTO_TCP         6       /* tcp */
#define IPPROTO_EGP         8       /* exterior gateway protocol */
#define IPPROTO_PUP         12      /* pup */
#define IPPROTO_UDP         17      /* user datagram protocol */
#define IPPROTO_IDP         22      /* xns idp */

#define IPPROTO_RAW         255     /* raw IP packet */
#define IPPROTO_MAX         256


/*
 * Ports < IPPORT_RESERVED are reserved for
 * privileged processes (e.g. root).
 * Ports > IPPORT_USERRESERVED are reserved
 * for servers, not necessarily privileged.
 */
#define IPPORT_RESERVED     1024
#define IPPORT_USERRESERVED 5000

/*
 * Link numbers
 */
#define IMPLINK_IP          155
#define IMPLINK_LOWEXPER    156
#define IMPLINK_HIGHEXPER   158

/*
 * Internet address (a structure for historical reasons)
 */
struct in_addr {
    u_long s_addr;
};

/*
 * Definitions of bits in internet address integers.
 * On subnets, the decomposition of addresses to host and net parts
 * is done according to subnet mask, not the masks here.
 */
#define IN_CLASSA(i)        (((long)(i) & 0x80000000L) == 0)
#define IN_CLASSA_NET       0xff000000L
#define IN_CLASSA_NSHIFT    24
#define IN_CLASSA_HOST      0x00ffffffL
#define IN_CLASSA_MAX       128

#define IN_CLASSB(i)        (((long)(i) & 0xc0000000L) == 0x80000000L)
#define IN_CLASSB_NET       0xffff0000L
#define IN_CLASSB_NSHIFT    16
#define IN_CLASSB_HOST      0x0000ffffL
#define IN_CLASSB_MAX       65536

#define IN_CLASSC(i)        (((long)(i) & 0xe0000000L) == 0xc0000000L)
#define IN_CLASSC_NET       0xffffff00L
#define IN_CLASSC_NSHIFT    8
#define IN_CLASSC_HOST      0x000000ffL

#define IN_CLASSD(i)        (((long)(i) & 0xf0000000L) == 0xe0000000L)
#define IN_MULTICAST(i)     IN_CLASSD(i)

#define IN_EXPERIMENTAL(i)  (((long)(i) & 0xe0000000L) == 0xe0000000L)
#define IN_BADCLASS(i)      (((long)(i) & 0xf0000000L) == 0xf0000000L)

#define INADDR_ANY          0x00000000L
#define INADDR_BROADCAST    0xffffffffL /* must be masked */
#ifndef KERNEL
#define INADDR_NONE         0xffffffffL /* -1 return */
#endif

#define IN_LOOPBACKNET      127     /* official! */

/*
 * Socket address, internet style.
 */
struct sockaddr_in {
    short   sin_family;
    u_short sin_port;
    struct  in_addr sin_addr;
    char    sin_zero[8];
};

/*
 * Options for use with [gs]etsockopt at the IP level.
 */
#define IP_OPTIONS          1       /* set/get IP per-packet options */

/*
 * Definitions for inet sysctl operations.
 *
 * Third level is protocol number.
 * Fourth level is desired variable within that protocol.
 */
#define IPPROTO_MAXID       (IPPROTO_IDP + 1)   /* don't list to IPPROTO_MAX */

#ifndef KERNEL
#define CTL_IPPROTO_NAMES { \
    { "ip", CTLTYPE_NODE }, \
    { "icmp", CTLTYPE_NODE }, \
    { "igmp", CTLTYPE_NODE }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { "tcp", CTLTYPE_NODE }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { "udp", CTLTYPE_NODE }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { 0, 0 }, \
    { "idp", CTLTYPE_NODE }, \
}
#endif /* KERNEL */

/*
 * Names for IP sysctl objects
 */
#define IPCTL_FORWARDING    1   /* act as router */
#define IPCTL_SENDREDIRECTS 2   /* may send redirects when forwarding */
#define IPCTL_DEFTTL        3   /* default TTL */
#ifdef notyet
#define IPCTL_DEFMTU        4   /* default MTU */
#endif
#define IPCTL_FORWSRCRT     5   /* forward source-routed dgrams */
#define IPCTL_MAXID         6

#ifndef KERNEL
#define IPCTL_NAMES { \
    { 0, 0 }, \
    { "forwarding", CTLTYPE_INT }, \
    { "redirect", CTLTYPE_INT }, \
    { "ttl", CTLTYPE_INT }, \
    { "mtu", CTLTYPE_INT }, \
    { "forwsrcrt", CTLTYPE_INT }, \
}
#endif /* KERNEL */
